<html>

<head>
<link href="https://cdn.bootcss.com/bootstrap/3.3.0/css/bootstrap.min.css"
rel="stylesheet" />
<script type="text/javascript">$(document).ready(function(){
 });
</script>
</head>
<body>
<div class="row-fluid">
    <div class="span10 well">
        <h3>frame</h3>
  <iframe id="if" name="nf" src="https://blog.csdn.net/qq_42610167?spm=1001.2101.3001.5343" width="800"
     height="300">
       </iframe>
    </div>
</div>



</body>

<script

src="https://cdn.bootcss.com/bootstrap/3.3.0/css/bootstrap.min.js"></script>

</html>